this morning, a popular blogger who's passion for healthy eating became an obsession. The blond vegan became a social media empire. And then aneating problem. Juju Chang has the story. Reporter: For 23-year-old Jordan younger, going vegan began as getting healthy. Little did she know, the blond vegan, chronicling her food choices would amass a huge following on instagram. More than 70,000 followers. And after a year of living and touting that lifestyle, younger said things went sour. I would stand in front of the refrigerator for 20 minutes panicking that I wasn't going to be eating the right thing for my body. I was a slave for food. Reporter: In a blog post, why I'm transitioning away from veganism. She's developed orthorexia. I've never heard of it. It's not surprising at all. Reporter: She restricted her diet and developed a rash. Grew weak, even stopped having her period. I star started realizing I was having vitamin deficiencies. Reporter: You were malnourished. Was through veganism. Reporter: You exposed the dark underbelly. But after coming forward, she was bombarded with negative comments, people saying she was not a true vegan. And worse. I got death threats. On the opposite side, so much support from so many people. Reporter: Now Jordan has added fish and eggs. And changed her instagram from vegan to veggie. Focusing now on a new direction and a new venture, a new clothing line. The message is about balance. Do whatever you're doing in moderation. Juju Chang, ABC news, new York. And bring in ABC's chief health director, Dr. Richard Bess Besser. I want to talk about orthoughrexia. It's an eating disorder. Not an official psychiatric diagnose. But similar to anorexia and bulimia. It's the corralories and the weight. This is about the food itself. The perfect diet. Which is imperfect at time. This was a plant-based vegan diet. It can be healthy and correct. There's no dairy, no eggs. And that can be a healthful approach, but you have to be careful. Especially with kids on this. Vitamin b-12 only found in animal products, calcium, hard to get enough calories, there's so much fiber. You can do it well, but you should work with a nutritionist. Great advice. Something else burning up the heat index.

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